Study On The Spatial Pattern Of Plant Species Diversity In Hilly City In Central Of Guizhou Province

Urban biodiversity is a special component of global biodiversity.It shows the complex relationship between urban organisms,living things and habitats,and the ecological environment and human beings,which reflects the richness and variation of urban organisms.In recent years,with the acceleration of urbanization,urban ecological patches was broken,habitats was lost,even the extinction rate of urban biodiversity in some parts was increase.Plants are not only the most important primary producer of ecosystem,but also provide basic resources and habitats for other organisms.To a large extent,the diversity and richness of non-plant species are determined by plants,but human activities often directly affect the diversity of its species.Anshun is a typical hills city in the Karst area of central Guizhou,the characteristic of urban-hill masoic is obvious.Because the complexity of its topography and landform,natural green land and remanets with high indigenous biodiversity will form in the urban area,the spatial distribution of biodiversity has its own characteristic.Based on this background,studying the spatial distribution characteristics of plant species diversity in Anshun city is of great significance for understanding the impact of urbanization on the biodiversity and the conservation of biodiversity of hilly cities in central Guizhou.Taking the planning scope of the main urban area of Anshun as the study area,using the spatial information technology based on field investigation with remote sensing images,the spatial characteristics of plant species diversity and the reasons for its formation were analyzed in the paper.On this basis,some reasonable suggestions were put forward for the conservation and planning of plant species diversity in the main urban area in Anshun.There are some main conclusions of the study :firstly,the plough and natural hills green land are the first and second habitats in the study area in 2007-2017,meanwhile,they are also the most reduced habitats in the process of urbanization.Secondly,the plant species is abundant in the main urban area of Anshun,with a total of 126 families,362 genus and 469 species(including varieties),in which,the northernpart(the central of Jiaozishan)and the southern part(East Street)of the central city of Anshun the richness of plants are higher,in the west(Songqi and Yaopu)and the east(north East Street and the east of Jiaozishan)it is lower.Then,the distribution of plants is uneven.Thirdly,the plant species and richness of different habitats in Anshun city are different,the natural hill green land is the main carrier,and the human disturbance is the main factor.Fourthly,based on biodiversity,the study has identified six important ecological protection patches and given reasonable conservation and planning suggestions.This study not only enriches the research contents of plant species diversity in the city-hill,but also provides a theoretical support for the conservation and development of plant species diversity in Anshun city.